Added cache for incremental build. (#1184)

* Added cache for incremental build.

* Test cache

* Added more content to cache

* Added more content to cache

* Test build cache

Co-authored-by: v-jizhang <[email protected]>
Co-authored-by: Brian Johnson <[email protected]>
Co-authored-by: holly1238 <[email protected]>

Author: 4 people

.circleci/config.yml

@@ -116,6 +116,8 @@ pytorch_tutorial_build_defaults: &pytorch_tutorial_build_defaults
         export AWS_ACCESS_KEY_ID=${CIRCLECI_AWS_ACCESS_KEY_FOR_ECR_READ_ONLY}
         export AWS_SECRET_ACCESS_KEY=${CIRCLECI_AWS_SECRET_KEY_FOR_ECR_READ_ONLY}
         eval $(aws ecr get-login --region us-east-1 --no-include-email)
+  - restore_cache:
+      key: v1.0-tutorial-{{ .Environment.CIRCLE_JOB }}
   - run:
       name: Build
       no_output_timeout: "20h"
@@ -164,11 +166,35 @@ pytorch_tutorial_build_defaults: &pytorch_tutorial_build_defaults
         fi
         set -x
 
+        # This also copies the cached build to docker.
         docker cp /home/circleci/project/. "$id:/var/lib/jenkins/workspace"
 
         export COMMAND='((echo "source ./workspace/env" && echo "sudo chown -R jenkins workspace && cd workspace && ./ci_build_script.sh") | docker exec -u jenkins -i "$id" bash) 2>&1'
         echo ${COMMAND} > ./command.sh && unbuffer bash ./command.sh | ts
 
+        # Copy the last build from docker
+        docker cp "$id:/var/lib/jenkins/workspace/_build" /home/circleci/project
+        docker cp "$id:/var/lib/jenkins/workspace/docs" /home/circleci/project
+        docker cp "$id:/var/lib/jenkins/workspace/advanced" /home/circleci/project
+        docker cp "$id:/var/lib/jenkins/workspace/beginner" /home/circleci/project
+        docker cp "$id:/var/lib/jenkins/workspace/intermediate" /home/circleci/project
+        docker cp "$id:/var/lib/jenkins/workspace/prototype" /home/circleci/project
+        docker cp "$id:/var/lib/jenkins/workspace/recipes" /home/circleci/project
+        docker cp "$id:/var/lib/jenkins/workspace/src" /home/circleci/project
+
+  - save_cache:
+      # Save to cache for incremental build
+      key: v1.0-tutorial-{{ .Environment.CIRCLE_JOB }}
+      paths:
+        - /home/circleci/project/_build
+        - /home/circleci/project/docs
+        - /home/circleci/project/advanced
+        - /home/circleci/project/beginner
+        - /home/circleci/project/intermediate
+        - /home/circleci/project/prototype
+        - /home/circleci/project/recipes
+        - /home/circleci/project/src
+
 pytorch_tutorial_build_worker_defaults: &pytorch_tutorial_build_worker_defaults
   environment:
     DOCKER_IMAGE: "308535385114.dkr.ecr.us-east-1.amazonaws.com/pytorch/pytorch-linux-xenial-cuda10.2-cudnn7-py3-gcc7"